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Finding the Fourth Proportional to 710,464.92, 980,430.15 and 388,168.10

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Solution

The fourth proportional to 710,464.92, 980,430.15 and 388,168.10 is: 535,665.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,464.92 : 980,430.15 = 388,168.10 : x
  2. Step 2: Convert to fraction form
    710,464.92/980,430.15 = 388,168.10/x
  3. Step 3: Cross multiply
    710,464.92x = 980,430.15 × 388,168.10
  4. Step 4: Simplify right side
    710,464.92x = 380,571,708,508.22
  5. Step 5: Solve for x
    x = 380,571,708,508.22/710,464.92
  6. Step 6: Final answer
    x = 535,665.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.